论文标题
通过Quijote Line调查发现五种丙烯的氰基衍生物
Discovery of five cyano derivatives of propene with the QUIJOTE line survey
论文作者
论文摘要
我们报告了通过Quijote系调查发现了propene的五种丙烯衍生物:$ trans $和$ cis $ -crotononInitrile($ t $ -CH $ _3 $ _3 $ CHCHCN,$ C $ -CH $ -CH $ _3 $ _3 $ CHCHCN),MECHACRYLONITRILE(METHACRYLONITRILE(CH $ _2 $ CAN)和CH $ _2 $ _____________3333333 $ _33 33 $ _333333 $ _3333 $ CIS $ -ALYL CYANIDE($ G $ -CH $ _2 $ CHCH $ _2 $ CN和$ C $ -CH $ _2 $ CHCH $ _2 $ CN)。观察到的过渡使我们能够为所有人提供7 $ \ pm $ 1 K的常见旋转温度。派生的列密度为n($ t $ -CH $ _3 $ chchcn)=(5 $ \ pm $ 0.5)$ \ times $ 10 $^{10} $ cm $ $ $^{ - 2} $,n($ C $ -C $ -CH $ -CH $ _3 $ _3 $ chchcn)=(1.3 $ 0.2 $ 0.2 $ 0.2 $ \ $ \ $ \ $ \ \ $ \ \ $ \ \ $ \ \^$} $} $} $} $} $}^^$}^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^and} n(ch $ _2 $ c(ch $ _3 $)cn)=(1.0 $ \ pm $ 0.1)$ \ times $ 10 $^{11} $ cm $^{ - 2} $,n($ g $ -ch $ _2 $ _2 $ _2 $ chch $ _2 $ _2 $ cn)和N($ C $ -CH $ _2 $ CHCH $ _2 $ CN)=(7.0 $ \ pm $ 0.7)$ \ times $ 10 $^{10} $ cm $^{ - 2} $。因此,相对于丙烯的氰基丙烯的丰度为$ \ sim $ 10 $^{ - 2} $,其比其他丰富碳氢化合物的其他氰基衍生物要低得多。对于丙烯的两个Ethynyl衍生物($ e $和$ Z $ -CH $ _3 $ chchcch)获得了上限。
We report the discovery of five cyano derivatives of propene towards TMC-1 with the QUIJOTE line survey: $trans$ and $cis$-crotononitrile ($t$-CH$_3$CHCHCN, $c$-CH$_3$CHCHCN), methacrylonitrile (CH$_2$C(CH$_3$)CN), and $gauche$ and $cis$-allyl cyanide ($g$-CH$_2$CHCH$_2$CN and $c$-CH$_2$CHCH$_2$CN). The observed transitions allowed us to derive a common rotational temperature of 7$\pm$1 K for all them. The derived column densities are N($t$-CH$_3$CHCHCN)=(5$\pm$0.5)$\times$10$^{10}$ cm$^{-2}$, N($c$-CH$_3$CHCHCN)=(1.3$\pm$0.2)$\times$10$^{11}$ cm$^{-2}$, N(CH$_2$C(CH$_3$)CN)=(1.0$\pm$0.1)$\times$10$^{11}$ cm$^{-2}$, N($g$-CH$_2$CHCH$_2$CN)=(8.0$\pm$0.8)$\times$10$^{10}$ cm$^{-2}$, and N($c$-CH$_2$CHCH$_2$CN)=(7.0$\pm$0.7)$\times$10$^{10}$ cm$^{-2}$, respectively. The abundance of cyano-propene relative to that of propene is thus $\sim$10$^{-2}$, which is considerably lower than those of other cyano derivatives of abundant hydrocarbons. Upper limits are obtained for two ethynyl derivatives of propene ($E$ and $Z$-CH$_3$CHCHCCH).